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Andrev October 13, 2011 15:02

heat transfer boussinesq
Dear Foam s,

can anyone tell me how can I set a fixed heat flux on a wall using buoyantBoussinesqPimpleFoam?

On the temperature file (T and, if I set temperature as a fixedGradient, does it works?

like grad (T) = qflux / k.

Thanks for the attention.

nimasam October 15, 2011 09:10

it depends ur k is fixed or not
1) if your k is fixed so use the fix Gradient for temperature

2) if your k is variable and change during simulation use groovyBC, to read k in each simulation and divide it into fixed qflux. (you can find in froum more ;) )

Andrev October 18, 2011 16:30

Thanks for the help.

I'm having problems with the time step of my case,
when I set a fixedGradient to define heat flux ( k constant), if I increase the time step on controlDict, the results change too: temperature increases...

Anyone know what am I doing wrong ?

Thanks for the attention.

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